Why I did:
Enhanced the monit process checked to support multi-asic .

How I did:

• For given feature we get the host and network namespace instances it's processes should be running
  based on it's scope (global/asic) and add it to expected set.

• From psutil we get number of running instances of the processes and add where it is running (host/network namespace) using "ip netns identify" to the the actual set

• Difference between expected and actual set provides instances where the processes are not running
  and will be logged as syslog message by monit

How I verify:

• O/P from Multi-asic platform

# Stop lldpmgrd in host lldp docker
admin@str2-xxxxx-acs-3:/var/log$ /usr/bin/process_checker lldp python /usr/bin/lldpmgrd
'python /usr/bin/lldpmgrd' is not running in host

# Stop ldpmgrd in lldp0 (asic0 namespace) docker
admin@str2-xxxx-acs-3:/var/log$ /usr/bin/process_checker lldp python /usr/bin/lldpmgrd
'python /usr/bin/lldpmgrd' is not running in host and in namespace asic0

# Stop ldpmgrd in lldp1 (asic1 namespace) docker
admin@str2-xxxxx-acs-3:/var/log$ /usr/bin/process_checker lldp python /usr/bin/lldpmgrd
'python /usr/bin/lldpmgrd' is not running in host and in namespace asic1, asic0

• Verified on Single Asic platforms also.